I have taken the Zac's Tracks course up here in Edmonton as well. I thought both the classroom and field sessions we equally as valuable and very strongly encourage everyone to take them (a must have actually).
After 15 years of riding in the mountians I really had my eyes open to how many things I was doing wrong and how many high risk situations I was in over the years. I also felt the field sessions were super important along with practise to follow as you will find when the pressure is on and you are in a rescue situation most people had no real clue what to do, how to properly use the beacon, and how really hard it is to dig someone out. And this was in a mock drill, put one of your friends in a real life/death situation and I'm sure this is magnified.
Make sure you encourage all your group to go, after all it's your buddies that will be saving you so they need to be good at it, not just you!